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Sagot :

VINS

bonsoir

A= (5x+3)(4x+7)

A = 20 x² + 35 x + 12 x + 21

A = 20 x² + 47 x + 21

B = (2x + 1)(3x 5)

B = 6 x² + 10 x + 3 x + 5

B = 6 x² + 13 x + 5

C.= (7x-3)(4x-5)

C = 28 x² - 35 x - 12 x + 15

C = 28 x² - 47x + 15

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